JPH0751310Y2 - Bag ejector of bag making machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag discharging device of a bag making machine capable of binding a predetermined number of bags and discharging them.

[0002]

2. Description of the Related Art Examples of flexible packaging bags include a three-way seal bag 1 as shown in FIG. 6 and a self-supporting bag 2 as shown in FIG.

The three-way seal bag 1 is formed by stacking a laminated sheet of a non-heat-fusible synthetic resin layer and a heat-fusible synthetic resin layer so that the non-heat-fusible synthetic resin layers are in contact with each other, and using a heat seal bar. Obtained by sealing the three sides. In the case of mechanical production of this, generally, two rows of long laminated sheets are stacked and fed in one direction while sealing the bags in multiple rows in the width direction, and this is repeated repeatedly in the length direction. In addition, the center line of the vertical seal portion 1a is cut by a slitter, and the adjacent portion of the horizontal seal portion 1b is cut by a cutter and discharged.

In the self-supporting bag 2, a sheet similar to the above is folded in two and the folded portion is folded inward to form a W shape.
It is obtained by cutting off both ends of the folded part and heat-sealing both left and right sides. When using this bag 2, if the two overlapping walls of the bag 2 are pulled apart,
The folded part expands to become the bottom part 2a. Therefore, the bag can be self-supporting. When mechanically producing such a self-supporting bag 2, while feeding a single long laminated sheet in one direction, both sides are bent and abutted at the center, and the U-shaped bag is bent at both sides at regular intervals. A cut is made, the bent portion is further folded inwardly into a W shape, and thereafter, heat sealing is performed in the width direction with a seal width including a U-shaped cut. After that, the central portion of this strip is cut with a slitter, and the center of the lateral seal portion 2b is cut.
Thereby, the self-supporting bags 2 can be produced in two rows.

[0005]

However, the conventional bag-making machine described above requires personnel for accumulating the individual bags discharged in the bag discharge section. This worker collects the bags to be discharged in a plurality of rows in the bag discharging section, arranges the number of the bags in a uniform number, and stacks them. Therefore, it takes time and labor to discharge the bag. Further, in order to prevent the collapse of the load during transportation, it is necessary to properly change the direction of the bags so that the piles of the bags have a uniform height when they are bundled in a uniform number. That is, in the three-sided seal bag 1, the mouth portion 1c is relatively flat, whereas the lateral seal portion 1b at the bottom is curled by heat sealing, and when stacked in the same direction, the peaks are inclined. Moreover, since the bottom portion 2a of the self-supporting bag 2 has four layers, stacking a large number of the same bags in the same direction causes the mountain to incline. Therefore, it is necessary to reverse about half of the bundles in one bundle, which further complicates the work of the bag discharging unit.

Therefore, the present invention aims to automate the bag collecting operation in the bag discharging section.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a bag stacking machine which is installed at the end of a bag discharge conveyor of a bag making machine and is driven in a direction perpendicular to the bag discharge conveyor. A conveyor, a soccer row for adsorbing a plurality of rows of bags on the bag discharging conveyor and transporting the bags to the bag collecting conveyor, and a pocket for receiving and stacking bags falling from the discharging side of the bag collecting conveyor. And a rotary actuator for rotating the football in a horizontal plane to change the orientation of the bag adsorbed to the football in a predetermined order so that the piles of the bags stacked in the pocket have a uniform height, The bag discharging device of the bag making machine includes a bundling machine for bundling a predetermined number of bags piled up from the pocket.

[0008]

The bag manufactured in the main body of the bag-making machine is cut into a plurality of rows and is discharged onto the bag discharging conveyor.

In the soccer row, each row of bags on the bag discharging conveyor is adsorbed and conveyed to the bag stacking conveyor. The rotary actuator is actuated while the sucker sucks the bag, and rotates the predetermined bag together with the sucker by a predetermined angle in the horizontal plane.

The order of changing the direction is, for example, every other line of bags. In that case, the bags are alternately placed in opposite rows and are placed on the bag stacking conveyor. The orientation of the bags can be changed in the same row, for example, every other rotary actuator can be activated. In that case, the bags alternate in the same row, but in opposite directions, onto the bag stacking conveyor. In addition, the order of changing the direction can be performed in plural columns.

The rotation angle is, for example, 180 ° in the case of the above-mentioned three-way seal bag, and is 90 ° in the case of the above-mentioned self-supporting bag. By driving the bag accumulating conveyor, the bags placed on the bag accumulating drops sequentially into the pockets and are accumulated.

When the number of bags in the pocket reaches a certain value,
A binding machine binds the pile of bags.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bag discharging device of a bag making machine will be described below with reference to the drawings. The three-sided bag making machine is
While stacking two long laminated sheets and sending them in one direction, a plurality of rows of bags are sealed in the width direction, and this sealing is repeated in the length direction. And
As shown in FIG. 1, the vertical seal portion 1 of this strip-shaped sheet
The center line of a is cut into each row by the slitter 3, and the adjacent portion of the horizontal seal portion 1b is cut by the cutter 4 and discharged onto the bag discharging conveyor 5.

The bag discharging conveyor 5 is adapted to be driven intermittently, and is stopped when the cutter 4 cuts the row of bags 1, and is driven when the cutting is completed. Therefore, the cut bags 1 advance in exactly one horizontal line.

At the tip of the bag discharging conveyor 5, a reject pocket 6 for receiving a defective product falling from the conveyor 5 is provided. Above the reject pocket 6 at the tip of the bag discharging conveyor 5, a bag stacking conveyor 7 driven in a direction perpendicular to the bag discharging conveyor 5 is provided. The bag stacking conveyor 7 is a belt conveyor that is always rotatable, and its speed is variable depending on the shape of the bag 1. When not in use, it can be flipped up to one side.

Above the bag discharging conveyor 5 and the bag collecting conveyor 7, as shown in FIGS. 1 and 2, a plurality of rows of bags 1 on the bag discharging conveyor 5 are adsorbed to collect the bags. A row of footballs 8 is provided to convey onto the conveyor 7. The soccer balls 8 are arranged in the lateral direction by the same number as the number of the bags 1 in a row, and are supported by the support rods 10 that traverse over the conveyor 5 via the support blocks 9, respectively. Support rod 1
As shown in FIG. 2, the block portions at both ends of 0 are connected to two endless chains 11 hung between the bag discharging conveyor 5 and the bag accumulating conveyor 7 via rotating pins 12, respectively. It is connected. The endless chain 11 is driven by an air cylinder or the like (not shown) so that the soccer 8 reciprocates between the bag discharging conveyor 5 and the bag collecting conveyor 7. Further, cam followers 13 are also pivotally attached to the block portions at both ends of the support rod 10, and the cam followers 13 are fitted in the cam grooves 14 arranged along the endless chain 11. The cam groove 14 is formed so that the soccer 8 can always move downward.

The soccer 8 is supported by the support rod 10 and moves back and forth between the bag discharging conveyor 5 and the bag accumulating conveyor 7 to suck and hold a row of bags 1 on the bag discharging conveyor 5. The bag is conveyed to the bag stacking conveyor 7, the suction is released, and the bag is dropped onto it. The row of footballs 8 may be driven not by the endless chain 11 or the like as described above but by a rocking lever so as to move back and forth between both conveyors 5, 7.

The soccer 8 is designed not to be sucked when the bag 1 is defective. That is, the discharge part of the bag-making machine is provided with a device for detecting stains on the design of the bag 1, and when this device operates, the valve of the corresponding soccer 8 remains closed. This defective product is conveyed as it is by the bag discharging conveyor 5 and drops into the reject pocket 6.

On the discharge side of the bag stacking conveyor 7, there is provided a first stacking pocket 15 for receiving and stacking the bags 1 falling therefrom. The first stacking pocket 15 has a substantially horizontal bottom plate 15a, an upright wall 15b located on the bag stacking conveyor 7 side of the bottom plate 15a, and a movable wall 15c located on the bag discharge conveyor 5 side. is doing. The movable wall 15c can reciprocate on the bottom plate 15a in a direction perpendicular to the bag stacking conveyor 7 by driving a cylinder (not shown). The cylinder is activated when the number of bags 1 accumulated in the first stacking pocket 15 reaches a certain value. This movable wall 15
The pile of the bags 1 accumulated in the first accumulation pocket 15 by c is discharged from there. The first stacking pocket 15 is adapted to vibrate by a vibrator so that the piles of the bag 1 dropped therein can be aligned.

A second collecting pocket 16 is provided on the discharge side of the first collecting pocket 15. The second collection pocket 16 is the first collection pocket 15
The movable wall 16c has the same structure as the above, and is arranged so that the movable wall 16c is below the bottom plate 15a of the first stacking pocket 15. The second stacking pocket 16 allows the piles of the bag 1 to be more neatly aligned, and a plurality of stacks of piles stacked in the first stacking pocket 15 can be stacked. It should be noted that this second collecting pocket 16 can be omitted.

A rotary actuator 17 is interposed between each of the soccer balls 8 and the supporting block 9 thereof. The operation of each rotary actuator 17 causes the sucker 8 to rotate by a predetermined angle in the horizontal plane to change the orientation of the bag 1 during suction. Further, the rotary actuators 17 are driven in a predetermined order to prevent the bags 1 from entering the first stacking pocket 15 all in the same direction, and the piles of the bags 1 stacked in the pocket 15 are uniform. It is designed to be high.

In order to prevent the adjacent bags 1 from interfering with each other when the direction of the bags 1 is changed, the soccer 8 is arranged so that the adjacent ones are vertically displaced. The rotary actuator 17 may change the direction of the bag 1 every other row. In that case, the bag 1 will flow as shown in FIG. That is, on the bag discharging conveyor 5, for example, four bags 1 are intermittently moved in a horizontal row (FIG. 3 (A)) and sucked by the sucker 8 on the downstream side of the conveyor 5 (FIG. 3). (B)). The rotary actuator 17 is driven for a certain bag row to rotate the bag 1 together with the soccer 8 by 180 ° in the horizontal plane (Fig. 3).
(C)). Thereafter, the row of the bags 1 is dropped onto the bag collecting conveyor 7 as shown in FIG.
Go inside 5. The rotary actuator 17 does not drive the next bag row, and drops onto the bag stacking conveyor 7 in the state of FIG. 3 (A). Therefore, the four bags 1 are alternately reversed and deposited in the first stacking pocket 15.

The order of changing the direction may be set in plural columns. The orientation of the bags 1 can be changed in the same row. For example, as shown in FIGS. 4 (A) and 4 (B), when the bag 1 flows on the bag discharging conveyor 5 and the sucker 8 adsorbs these, the bag 1 is moved to the second and fourth bags 1 from the left of the bag row. The corresponding rotary actuator 17 operates to rotate the bag 1 180 °. Therefore, as shown in FIG. 4 (C), the bag rows are alternately reversed in the same row and ride on the bag stacking conveyor 7, and the first stacking pocket 1
In the inside of 5, the sheets are deposited in the opposite direction.

In the case of the self-supporting bag 2, it is possible to automatically and alternately flow the bags 2 in opposite directions by setting the rotation angle of the rotary actuator 17 to 90 °. That is, on the bag discharging conveyor 5, the two bags 2 have their openings 2
The c are intermittently moved in a horizontal row so that they face each other (FIG. 5 (A)), and are sucked by the sucker 8 on the downstream side of the conveyor 5 (FIG. 5 (B)). Then, the rotary actuator 17 is driven for each bag row to rotate the bag 2 together with the soccer 8 by 90 ° in the horizontal plane (FIG. 5).
(C)). Thereafter, the row of bags 2 falls on the bag stacking conveyor 7 as shown in FIG.
Go inside 5. Therefore, the bags 2 are alternately reversed and deposited in the first stacking pocket 15.

At the tip of the second collecting pocket 16,
A binding machine 18 that receives and binds a certain number of piles of the bags 2 pushed out by the movable wall 16c is installed.
The binding machine 18 is, for example, a banding machine, and binds the piles of the bag 2 with a polyethylene-coated kraft paper tape and fixes them by heat sealing.

On the discharge side of the binding machine 18, a discharge conveyor 1
9 is provided. Next, a series of movements of the bag discharging device of the bag making machine will be described by taking the case of the three-way seal bag 1 as an example.

As shown in FIG. 1, when four bags 1 are discharged in a horizontal row from the cutter 4, the bag discharging conveyor 5 receives them and intermittently feeds them in one direction.
The sucker 8 adsorbs the bags 1 on the bag discharging conveyor 5 one by one and then conveys them onto the bag collecting conveyor 7. Then, while the sucker 8 is sucking the bag 1, a predetermined rotary actuator 17 operates, or all the rotary actuators 17 operate for each bag row to change the direction of the bag 1.

The bag stacking conveyor 7 receives the bag 1 released from the football 8 and sends it to the first stacking pocket 15. The first stacking pocket 15 is the bag stacking conveyor 7.
The bags 1 that fall from the discharge side of are received and stacked. The piles of the bags 1 stacked in the accumulating pocket 15 have a uniform height because half of them are in the opposite direction as described above.

When the number of piles of the bag 1 reaches a predetermined number, the first stacking pocket 15 pushes the piles to the next second stacking pocket 16. The second stacking pocket 16 overlaps the pile of the bag 1 with the next pile and arranges them neatly to form a binding machine 18.
Push it toward.

The binding machine 18 binds the piles of the bags 1 and discharges them onto the discharging conveyor 19. The bundle of the bundled bags 1 has a uniform height as described above, and even if they are stacked, the load does not collapse.

[0031]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, the bags coming out of the bag-making machine can be automatically stacked at a uniform height and bound. Therefore, the bag collecting operation in the bag discharging portion of the bag making machine can be simplified and speeded up.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a bag discharging device of a bag making machine according to the present invention.

FIG. 2 is a schematic side view of a main part of the bag discharging device.

FIG. 3 is a fragmentary plan view showing an example of the flow of bags in the bag discharging device.

FIG. 4 is a fragmentary plan view showing another example of the flow of bags in the bag discharging device.

FIG. 5 is a fragmentary plan view showing still another example of the flow of bags in the bag discharging device.

FIG. 6 is a perspective view of a three-way seal bag that can be processed by the bag discharging device.

FIG. 7 is a perspective view of an assembled self-supporting bag that can be processed by the bag discharging device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Three-sided seal bag 1b ... Bottom side seal part 2 ... Self-supporting bag 2a ... Bottom part 5 ... Bag discharge conveyor 7 ... Bag stacking conveyor 8 ... Soccer 15 ... Stacking pocket 17 ... Rotary actuator 18 ... Binding machine

Claims (1)

[Scope of utility model registration request] 1. A bag stacking conveyor which is installed in front of a bag discharging conveyor of a bag making machine and is driven in a direction perpendicular to the bag discharging conveyor, and a plurality of rows of bags on the bag discharging conveyor. Rows of soccer sucked and conveyed to the bag stacking conveyor, stacking pockets for receiving and stacking bags falling from the discharge side of the bag stacking conveyor, and piles of bags stacked in the stacking pockets. A rotary actuator for rotating the sucker in a horizontal plane so as to have a uniform height to change the direction of the bag adsorbed to the sucker in a predetermined order, and a predetermined number of sheets discharged from the collecting pocket. A bag discharging device for a bag making machine, comprising: a binding machine for binding a pile of bags.